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From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Is #define THING -10 completely safe?
Message-ID: <14998@smoke.brl.mil>
Date: 28 Jan 91 05:08:07 GMT
References: <33@christmas.UUCP>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 13

In article <33@christmas.UUCP> rtm@island.COM (Richard Minner) writes:
>Something I've been curious about, should the above be
>#define INT_MIN   (-2147483648)

Yes.

>The precedence rules seem to imply that ()'s aren't needed
>with a negative integer constant.

There are contexts that could cause trouble, e.g. "x-INT_MIN"
or "x=INT_MIN".  While the C standard requires that these work
as expected, many older C implementations will misinterpret
these.